Anvil knife



Patented Sept. 29, 1925.

UNITED STATES PATENT OFFICE.

GEORGE D. ALEXIS, OF NEW ORLEANS, LOUISIANA.

ANVIL KNIFE.

Application filed June 4,

To a whom it may concern:

Be it known that I, GEORGE D. ALnXrs, a

citizen of the United States, residing at New I th, 191.9, to R. F. Lovejoy and myself.

In certain types of hog machines a V- shaped anvil is used and on the side faces of the anvil are bolted knives adapted to cooperate with other knives for the purpose of reducing to chips all refuse lumber fed to the machine. The anvil knives heretofore used, however, quickly wear out near the point of the V-shaped anvil and unless some means is employed for adjusting the anvil knife so as to bring another portion of its cutting edge to lowermost position, the knife must soon be discarded and a new one substituted therefor. In the patent hereinbefore mentioned a knife has been shown with hardened portions at the corners of the blade whereby, by reversing the blade, any one of the corners can be brought to lowermost position where the blade is subjected to the greatest wear. Thus the life of the blade is greatly prolonged. With a structure of the type covered by the patent, however, it becomes necessary to discard the entire blade after all of the corner portions have worn away.

It is an object of the present invention to provide a knife, the wearing portions of which can be completely detached when no longer of service and others substituted therefor at comparatively low cost. Thus it becomes unnecessary to discard the entire blade and, consequently a considerable saving is effected in the operation of the hog.

A further object is to provide simple and efficient means whereby the detachable cutting portions can be securely held to the main or body portion of the blade.

with the foregoing and other objects in View which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in 1924. Serial N0. 717,806.

the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed may be made within the scope of what is claimed without departing from the spirit of the invention.

In the accompanying drawings the preferred form of the invention has been shown.

In said drawings Figure 1 is a perspective View of an. anvil knife embodying the present improvements.

Fig. 2 is a face view of one corner portion thereof. 1

Fig. 3 is a section on line 3-3, Fig. 1.

Fig. 4 is a section on line 414E, Fig. 1.

Fig. 5 is a perspective view of one of the fastening keys used in connection with the knife.

Fig. 6 is a view similar to Fig. 3 showing a slightly modified structure.

Referring to the figures by characters of reference 1 designates the body portion of the knife which, in the form shown, can be provided with a central longitudinal depression 2 having a slot 3 whereby said body portion can be readily bolted to a V-shaped anvil (not shown) such as used in saw mill hogs. The ends of the knives are beveled, as shown at a so that when two knives are assembled on the converging faces of the V- shaped anvil, their lower ends can be brought close together.

The body portion 1 of the knife may be made of a cheap metal such as iron and the sides thereof are faced with cutting strips 5 formed preferably of hardened steel adapted to fit snugly against said faces and having their ends flush with the beveled ends 4 of the body 1. The sides of the body and the inner faces of the strips 5 are formed with dove-tailed grooves 6 which register as shown particularly in Fig. 2. These registering grooves are designed to receive keys 7 each comprising a strip of metal having longitudinal V-shaped grooves 8 in the sides thereof so that the keys will fit snugly within the matching clove-tail grooves and hold the strips 5 to the body.

For the purpose of holding the strips 5 against movement longitudinally of the in serted keys 7, each of said strips 5 can be formed, on its inner face, with a longitudinal rib 9 adapted to be seated within a correspending groove 10 formed in the body 1. This rib can be triangular as shown in Figs.

3 and at or, if preferred, can be rectangular as illustrated at 11 in Fig. 6.

It will be obvious that Whenever both end portions of one of the strips 5 becomes Worn so as to be unfit for further use, the keys 7 used for holding the strip to the body 1 can be ejected and another strip placed in position and secured, the same keys being used. Thus it becomes unnecessary to discard the entire knife and, consequently, the cost of maintaining the knife in workable condition is materially reduced as compared With those structures wherein the entire knife must be discarded after all usable portions have become Worn.

What is claimed is l 1. An anvil knife for sawmill hogs including a body portion, and side strips of hardened metal detachably secured to the body portion, said side strips providing cutting edges at the end thereof.

1. An anvil knife for sawmill hogs including a body portion, hardened metal strips mounted upon opposed sides of the body portion and having end cutting edges, and removable keys interposed between and detachably engaging both the body portion and side strips for holding them assembled.

3. An anvil knife for sawmill hogs including a body portion, hardened metal strips mounted upon opposed sides of the body portion and having end clipping edges, removable keys interposed between and detachably engaging both the body portion and side strips for holding them assembled, and means upon the body portion and side strips acting in conjunction with the keys for holding the side strips against movement relative to the body portion.

In testimony that I claim the foregoing as my own, I have hereto affixed my signa ture.

GEORGE D. ALEXIS. 

